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https://issues.apache.org/jira/browse/IMPALA-7449?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Ho resolved IMPALA-7449.
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Resolution: Fixed
Fix Version/s: Impala 3.1.0
> TotalNetworkThroughput in KrpcDataStreamSender is broken
> --------------------------------------------------------
>
> Key: IMPALA-7449
> URL: https://issues.apache.org/jira/browse/IMPALA-7449
> Project: IMPALA
> Issue Type: Bug
> Components: Distributed Exec
> Affects Versions: Impala 3.0, Impala 2.12.0
> Reporter: Michael Ho
> Assignee: Michael Ho
> Priority: Critical
> Fix For: Impala 3.1.0
>
>
> The network throughput computation fails to take into account of the fact
> that multiple RPCs can be happening in parallel. Currently, the throughput is
> computed by (total bytes sent / total network time). The total network time
> is the aggregate of the network time observed of each RPC. This seems hard to
> understand (or wrong?) when there are drastically different throughput when
> sending to different hosts. It may be slightly easier to understand if we
> switch to measuring the observed network throughput of each individual RPC
> and use a summary counter or a histogram to record the throughput.
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